As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CYLINDER NR 3 CRACKED FROM BOTTOM SPARK PLUG HOLE THROUGH EXHAUST PORT EXTENDING INTO EXTERNAL FINDS. FOUND DURING COMPRESSION CHECK FOR ANNUAL INSPECTION. CHANNEL CHROME CYLINDER, EXACT HOURS ON CYLINDER UNKNOWN (CHROME PLATED 9/86). SUBMITTER RECOMMENDED LIFE LIMIT ON CYLINDER HEAD SHOULD NOT EXCEED 1,800 HOURS. (X)